Defensive publication



a 3 7, 76 DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published atthe request of the applicant or owner in accordance with the Notice ofApr. 11, 1968, 849 0.G. 1221. Identification is by serial number of theapplication and the heading indicates the number of pages ofspecification, including claims, and of sheets of drawing contained inthe application as originally filed. The file of this application isavailable to the public for inspection; reproduction may be purchasedfor 30 cents per sheet.

Applications published under the Detensive Publication Program have notbeen examined as to the merits of alleged invention. The Patent Oflicemakes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED OCTOBER 28, 1969 835,251 PROCESS FOR MAKING ALKALI CELLULOSEDonald A. Sharman, Conifers 99A Kelsey Lane, Balsall Common, nearCoventry, Warwickshire, England Filed June 20, 1969. Published Oct. 28,1969 Claims priority, application Great Britain, June 20, 1968,29,351/68 Int. Cl. D21c 3/02 US. Cl. 162-90 No Drawing. 4 PagesSpecification A process for making solid alkali cellulose comprisingmixing and steeping wood pulp with an aqueous caustic soda solution toform a slurry, passing the slurry to a slurry press and then pressingthe slurry to form solid alkali cellulose, and including the step ofinjecting live steam into the slurry as it is being passed to the slurrypress so as to raise its temperature. The mixing and steeping operationmay be carried out at a temperature of about 45 C. and the pressingoperation at a temperature of about 55 C.

